cxx1z-fold-expression.cpp revision 176edba5311f6eff0cad2631449885ddf4fbc9ea 
1// RUN: %clang_cc1 -std=c++1z -triple %itanium_abi_triple -emit-llvm -o - %s | FileCheck %s
2
3template<int> struct A {};
4template<int ...N> void foldr(A<(N + ...)>);
5template<int ...N> void foldl(A<(... + N)>);
6template<int ...N> void foldr1(A<(N + ... + 1)>);
7template<int ...N> void foldl1(A<(1 + ... + N)>);
8void use() {
9  foldr<1, 2, 3>({});
10  foldl<1, 2, 3>({});
11  foldr1<1, 2, 3>({});
12  foldl1<1, 2, 3>({});
13  // CHECK-DAG: @_Z5foldrIJLi1ELi2ELi3EEEv1AIXfrplT_EE(
14  // CHECK-DAG: @_Z5foldlIJLi1ELi2ELi3EEEv1AIXflplT_EE(
15  // CHECK-DAG: @_Z6foldr1IJLi1ELi2ELi3EEEv1AIXfRplT_Li1EEE(
16  // CHECK-DAG: @_Z6foldl1IJLi1ELi2ELi3EEEv1AIXfLplLi1ET_EE(
17}
18
19template<int ...N> using Foldr = A<(N + ...)>;
20template<int ...N> using Foldl = A<(... + N)>;
21template<int ...N> using Foldr1 = A<(N + ... + 1)>;
22template<int ...N> using Foldl1 = A<(1 + ... + N)>;
23
24template<int ...A> struct Partial {
25  template<int ...B> void foldr(Foldr<A..., B..., A..., B...>);
26  template<int ...B> void foldl(Foldl<A..., B..., A..., B...>);
27  template<int ...B> void foldr1(Foldr1<A..., B..., A..., B...>);
28  template<int ...B> void foldl1(Foldl1<A..., B..., A..., B...>);
29};
30void use(Partial<1, 2> p) {
31  p.foldr<3, 4>({});
32  p.foldl<3, 4>({});
33  p.foldr1<3, 4>({});
34  p.foldl1<3, 4>({});
35  // CHECK-DAG: @_ZN7PartialIJLi1ELi2EEE5foldrIJLi3ELi4EEEEv1AIXplLi1EplLi2EfRplT_plLi1EplLi2EfrplT_EE(
36  // CHECK-DAG: @_ZN7PartialIJLi1ELi2EEE5foldlIJLi3ELi4EEEEv1AIXfLplplplfLplplLi1ELi2ET_Li1ELi2ET_EE
37  // CHECK-DAG: @_ZN7PartialIJLi1ELi2EEE6foldr1IJLi3ELi4EEEEv1AIXplLi1EplLi2EfRplT_plLi1EplLi2EfRplT_Li1EEE(
38  // CHECK-DAG: @_ZN7PartialIJLi1ELi2EEE6foldl1IJLi3ELi4EEEEv1AIXfLplplplfLplplplLi1ELi1ELi2ET_Li1ELi2ET_EE(
39}
40
41extern int n;
42template<int ...N> void f() {
43  (n = ... = N);
44}
45template void f<>();
46